A Practical Catalytic Asymmetric Addition of Alkyl Groups to Ketones
作者:Celina García、Lynne K. LaRochelle、Patrick J. Walsh
DOI:10.1021/ja026568k
日期:2002.9.1
Many catalysts will promote the asymmetric addition of alkylzinc reagents to aldehydes. In contrast, there are no reports of additions to ketones that are both general and highly enantioselective. We describe herein a practical catalytic asymmetric addition of ethyl groups to ketones. The catalyst is derived from reaction of camphor sulfonyl chloride and trans-1,2-diaminocyclohexane. The resulting